0001 // SPDX-License-Identifier: GPL-2.0
0002 #include "bcm283x.dtsi"
0003 #include "bcm2835-common.dtsi"
0004 #include "bcm2835-rpi-common.dtsi"
0005
0006 / {
0007 compatible = "brcm,bcm2836";
0008
0009 soc {
0010 ranges = <0x7e000000 0x3f000000 0x1000000>,
0011 <0x40000000 0x40000000 0x00001000>;
0012 dma-ranges = <0xc0000000 0x00000000 0x3f000000>;
0013
0014 local_intc: local_intc@40000000 {
0015 compatible = "brcm,bcm2836-l1-intc";
0016 reg = <0x40000000 0x100>;
0017 interrupt-controller;
0018 #interrupt-cells = <2>;
0019 interrupt-parent = <&local_intc>;
0020 };
0021 };
0022
0023 arm-pmu {
0024 compatible = "arm,cortex-a7-pmu";
0025 interrupt-parent = <&local_intc>;
0026 interrupts = <9 IRQ_TYPE_LEVEL_HIGH>;
0027 };
0028
0029 timer {
0030 compatible = "arm,armv7-timer";
0031 interrupt-parent = <&local_intc>;
0032 interrupts = <0 IRQ_TYPE_LEVEL_HIGH>, // PHYS_SECURE_PPI
0033 <1 IRQ_TYPE_LEVEL_HIGH>, // PHYS_NONSECURE_PPI
0034 <3 IRQ_TYPE_LEVEL_HIGH>, // VIRT_PPI
0035 <2 IRQ_TYPE_LEVEL_HIGH>; // HYP_PPI
0036 always-on;
0037 };
0038
0039 cpus: cpus {
0040 #address-cells = <1>;
0041 #size-cells = <0>;
0042 enable-method = "brcm,bcm2836-smp";
0043
0044 /* Source for d/i-cache-line-size and d/i-cache-sets
0045 * https://developer.arm.com/documentation/ddi0464/f/L1-Memory-System
0046 * /About-the-L1-memory-system?lang=en
0047 *
0048 * Source for d/i-cache-size
0049 * https://forums.raspberrypi.com/viewtopic.php?t=98428
0050 */
0051
0052 v7_cpu0: cpu@0 {
0053 device_type = "cpu";
0054 compatible = "arm,cortex-a7";
0055 reg = <0xf00>;
0056 clock-frequency = <800000000>;
0057 d-cache-size = <0x8000>;
0058 d-cache-line-size = <64>;
0059 d-cache-sets = <128>; // 32KiB(size)/64(line-size)=512ways/4-way set
0060 i-cache-size = <0x8000>;
0061 i-cache-line-size = <32>;
0062 i-cache-sets = <512>; // 32KiB(size)/32(line-size)=1024ways/2-way set
0063 next-level-cache = <&l2>;
0064 };
0065
0066 v7_cpu1: cpu@1 {
0067 device_type = "cpu";
0068 compatible = "arm,cortex-a7";
0069 reg = <0xf01>;
0070 clock-frequency = <800000000>;
0071 d-cache-size = <0x8000>;
0072 d-cache-line-size = <64>;
0073 d-cache-sets = <128>; // 32KiB(size)/64(line-size)=512ways/4-way set
0074 i-cache-size = <0x8000>;
0075 i-cache-line-size = <32>;
0076 i-cache-sets = <512>; // 32KiB(size)/32(line-size)=1024ways/2-way set
0077 next-level-cache = <&l2>;
0078 };
0079
0080 v7_cpu2: cpu@2 {
0081 device_type = "cpu";
0082 compatible = "arm,cortex-a7";
0083 reg = <0xf02>;
0084 clock-frequency = <800000000>;
0085 d-cache-size = <0x8000>;
0086 d-cache-line-size = <64>;
0087 d-cache-sets = <128>; // 32KiB(size)/64(line-size)=512ways/4-way set
0088 i-cache-size = <0x8000>;
0089 i-cache-line-size = <32>;
0090 i-cache-sets = <512>; // 32KiB(size)/32(line-size)=1024ways/2-way set
0091 next-level-cache = <&l2>;
0092 };
0093
0094 v7_cpu3: cpu@3 {
0095 device_type = "cpu";
0096 compatible = "arm,cortex-a7";
0097 reg = <0xf03>;
0098 clock-frequency = <800000000>;
0099 d-cache-size = <0x8000>;
0100 d-cache-line-size = <64>;
0101 d-cache-sets = <128>; // 32KiB(size)/64(line-size)=512ways/4-way set
0102 i-cache-size = <0x8000>;
0103 i-cache-line-size = <32>;
0104 i-cache-sets = <512>; // 32KiB(size)/32(line-size)=1024ways/2-way set
0105 next-level-cache = <&l2>;
0106 };
0107
0108 /* Source for cache-line-size + cache-sets
0109 * https://developer.arm.com/documentation/ddi0464/f/L2-Memory-System
0110 * /About-the-L2-Memory-system?lang=en
0111 * Source for cache-size
0112 * https://forums.raspberrypi.com/viewtopic.php?t=98428
0113 */
0114 l2: l2-cache0 {
0115 compatible = "cache";
0116 cache-size = <0x80000>;
0117 cache-line-size = <64>;
0118 cache-sets = <1024>; // 512KiB(size)/64(line-size)=8192ways/8-way set
0119 cache-level = <2>;
0120 };
0121 };
0122 };
0123
0124 /* Make the BCM2835-style global interrupt controller be a child of the
0125 * CPU-local interrupt controller.
0126 */
0127 &intc {
0128 compatible = "brcm,bcm2836-armctrl-ic";
0129 reg = <0x7e00b200 0x200>;
0130 interrupt-parent = <&local_intc>;
0131 interrupts = <8 IRQ_TYPE_LEVEL_HIGH>;
0132 };
0133
0134 &cpu_thermal {
0135 coefficients = <(-538) 407000>;
0136 };
0137
0138 /* enable thermal sensor with the correct compatible property set */
0139 &thermal {
0140 compatible = "brcm,bcm2836-thermal";
0141 status = "okay";
0142 };
